/**
 * 零基础学C语言
 * 
 * version: 1st
 * author: 明日科技
 * http://www.mingrisoft.com
 */

#include <stdio.h>

int minus(int num1, int num2) {
    int result;
    result = num1 - num2;
    return result;
}

int main() {
    int result;
    result = minus(9, 4);
    printf("%d", result);

    return 0;
}

/*
output:
5
*/